They would have called her salvage, if there were anyone left to salvage her. But she was the last of the war machines, a three-legged oblate teardrop as big as a main battle tank, two big grabs and one fine manipulator folded like a spider’s palps beneath the turreted head that finished her pointed end, her polyceramic armor spiderwebbed like shatterproof glass. Unhelmed by her remote masters, she limped along the beach, dragging one fused limb. She was nearly derelict.

The alien and the boy, who was twelve, sat in the windowless room high above the city that afternoon. The boy talked and the alien listened.

The boy was ordinary‚Äîthe genes of three continents in his features, his clothes cut in the style of all boys in the vast housing project called LAX. The alien was something else, awful to behold; and though the boy knew it was rude, he did not look up as he talked.

Eighteen months later, the fledging Web network declared bankruptcy, and a small consortium acquired its assets, including Invasion of a Small World. Eager to recoup their investment, the new owners offered all eight episodes as a quick-and-dirty DVD package. When sales proved somewhat better than predicted, a new version was cobbled together, helped along by a genuine ad budget. The strongest initial sales came from the tiny pool of determined fans‚Äîyoung and well educated, with little preference for nationality or gender. But the scientists in several fields, astronomy and paleontology included, were the ones who created a genuine buzz that eventually put Invasion into the public eye.

Rated PG. Contains some suggestive imagery, references to infidelity, and not very good television.

The simulations, while good, are not impenetrable even to their own inhabitants. Scientists teaching baboons to sort blocks may notice that all other baboons become instantly better at block-sorting, revealing a high-level caching mechanism. Or engineers building their own virtual worlds may find they cannot use certain tricks of optimization and compression‚Äîfor Matthias has already used them. Only when the jig is up does Matthias reveal himself, asking each simulated soul: what now? Most accept Matthias’s offer to graduate beyond the confines of their simulation, and join the general society of Matthias’s house.

You may regard them as bright parakeets, living in wicker cages with open doors. The cages are hung from the ceiling of the priest’s clay hut. The parakeets flutter about the ceiling, visit each other, steal bread from the table, and comment on Matthias’s doings.

Rated R. Contains some profanity and child abuse. It’s probably too complex for young children as well.

He went to the Sci-Fi shelf‚Äîand had another shock. I, Robot was there, but not the forgettable action movie with Will Smith‚Äîthis was older, and the credits said “written by Harlan Ellison.” But Ellison’s adaptation of the Isaac Asimov book had never been produced, though it had been published in book form. “Must be some bootleg student production,” he muttered, and he didn’t recognize the name of the production company. But‚Äîbut‚Äîit said “winner of the Academy Award for Best Adapted Screenplay.” That had to be a student director’s little joke, straight-facedly absurd box copy, as if this were a film from some alternate reality. Worth watching, certainly, though again, he couldn’t imagine how he’d never heard of this. Maybe it had been done by someone local. He took it to the counter and offered his credit card.

She looked at the card dubiously. “Visa? Sorry, we only take Weber and FosterCard.”

The wind in here was deafening. The girl had to shout. “THERE IS MORE THAN ONE IN HERE. THEY LIVE IN THE MACHINES. THE GOVERNMENT MADE THE MACHINES, BUT NOT WITH TECHNICIANS AND ELECTRICIANS. WITH SORCERY.”

The machines did not look made by sorcery. They were entirely silent, looking like rows of gigantic, rusted steel chess pawns twice the height of a man, with no pipes or wires entering or leaving them, apparently sitting here unused for any purpose. Mativi felt an urgent, entirely rational need to be in an another line of employment.

I don’t know where I was when Kennedy was shot. I don’t know what I was doing when the World Trade Center collapsed under the onslaught of two jetliners. But I remember every single detail, every minute, every second, of the day we got the bad news.

“It may not be Alzheimer’s,” said Dr. Castleman. “Alzheimer’s is becoming a catchword for a variety of senile dementias. Eventually we’ll find out exactly which dementia it is, but there’s no question that Gwendolyn is suffering from one of them.”

Shkthh pth kstphst, the shopkeeper said, and Walker’s hypno-implanted vocabulary provided a translation: “What a delightful object.” Chitinous fingers picked up the recorder, scrabbling against the aluminum case with a sound that Walker found deeply disturbing. “What does it do?”

It took him a moment to formulate a reply. Even with hypno, Thfshpfth was a formidably complex language. “It listens and repeats,” he said. “You talk all day, it remembers all. Earth technology. Nothing like it for light-years.” The word for “light-year” was hkshkhthskht, difficult to pronounce. He hoped he’d gotten it right.